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authorPascal Rigaux <pixel@mandriva.com>2002-08-22 22:42:56 +0000
committerPascal Rigaux <pixel@mandriva.com>2002-08-22 22:42:56 +0000
commitb61548ee174481b25e750be9f7d4c7484a0ebf96 (patch)
tree59ab4d150f6d8a72148f68763c8c61b714b7cb04 /perl-install/network/shorewall.pm
parentfbde1a0bdc207d0be42e9c32ed0da6f1526ef927 (diff)
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- add network::shorewall
- add tinyfirewall during install
Diffstat (limited to 'perl-install/network/shorewall.pm')
-rw-r--r--perl-install/network/shorewall.pm136
1 files changed, 136 insertions, 0 deletions
diff --git a/perl-install/network/shorewall.pm b/perl-install/network/shorewall.pm
new file mode 100644
index 000000000..a9f8ff384
--- /dev/null
+++ b/perl-install/network/shorewall.pm
@@ -0,0 +1,136 @@
+package network::shorewall; # $Id$
+
+use diagnostics;
+use strict;
+
+use detect_devices;
+use network::netconnect;
+use common;
+use log;
+
+my @drakgw_ports = qw(domain bootps);
+
+sub check_iptables {
+ my ($in) = @_;
+
+ my $existing_config = -f "$::prefix/etc/sysconfig/iptables";
+
+ $existing_config ||= $::isStandalone && do {
+ system('modprobe iptable_nat');
+ -x '/sbin/iptables' && listlength(`/sbin/iptables -t nat -nL`) > 8;
+ };
+
+ !$existing_config || $in->ask_okcancel(_("Firewalling configuration detected!"),
+ _("Warning! An existing firewalling configuration has been detected. You may need some manual fix after installation."));
+}
+
+sub set_config_file {
+ my ($file, @l) = @_;
+
+ my $done;
+ substInFile {
+ if (!$done && (/^#LAST LINE/ || eof)) {
+ $_ = join('', map { join("\t", @$_) . "\n" } @l) . $_;
+ $done = 1;
+ } else {
+ $_ = '' if /^[^#]/;
+ }
+ } "/etc/shorewall/$file";
+}
+
+sub get_config_file {
+ my ($file) = @_;
+ map { [ split ' ' ] } grep { !/^#/ } cat_("/etc/shorewall/$file");
+}
+
+sub default_interfaces {
+ my %conf;
+
+ my @l = detect_devices::getNet() or return;
+ if (@l == 1) {
+ $conf{net_interface} = $l[0];
+ $conf{loc_interface} = [ 'lo0' ];
+ } else {
+ $conf{net_interface} = network::netconnect::get_net_device() or return;
+ $conf{loc_interface} = [ grep { $_ ne $conf{net_interface} } @l ];
+ }
+ \%conf;
+}
+
+sub read {
+ my %conf;
+
+ $conf{disabled} = !glob_("$::prefix/etc/rc3.d/S*shorewall");
+
+ $conf{ports} =
+ join(' ', map {
+ my $e = $_;
+ map { "$_/$e->[3]" } split(',', $e->[4]);
+ } grep { $_->[0] eq 'ACCEPT' && $_->[1] eq 'net' } get_config_file('rules'));
+
+ if (my ($e) = get_config_file('masq')) {
+ $conf{masquerade}{subnet} = $e->[1] if $e->[1];
+ }
+ foreach (get_config_file('interfaces')) {
+ my ($name, $interface) = @$_;
+ if ($name eq 'net') {
+ $conf{net_interface} = $interface;
+ } elsif ($name eq 'masq') {
+ $conf{masquerade}{interface} = $interface;
+ } elsif ($name eq 'loc') {
+ push @{$conf{loc_interface}}, $interface;
+ } else {
+ log::l("unknown interface name $name");
+ }
+ }
+ $conf{net_interface} && \%conf;
+}
+
+sub write {
+ my ($conf) = @_;
+
+ my %ports_by_proto;
+ foreach (split ' ', $conf->{ports}) {
+ m!^(\d+)/(udp|tcp)$! or die "bad port $_\n";
+ push @{$ports_by_proto{$2}}, $1;
+ }
+
+ set_config_file("zones",
+ [ 'net', 'Net', 'Internet zone' ],
+ if_($conf->{masquerade}, [ 'masq', 'Masquerade', 'Masquerade Local' ]),
+ if_($conf->{loc_interface}, [ 'loc', 'Local', 'Local' ]),
+ );
+ set_config_file('interfaces',
+ [ 'net', $conf->{net_interface}, 'detect' ],
+ $conf->{masquerade} ? [ 'masq', $conf->{masquerade}{interface}, 'detect' ] : (),
+ (map { [ 'loc', $_, 'detect' ] } @{$conf->{loc_interface} || []}),
+ );
+ set_config_file('policy',
+ if_($conf->{masquerade}, [ 'masq', 'net', 'ACCEPT' ]),
+ if_($conf->{loc_interface}, [ 'loc', 'net', 'ACCEPT' ]),
+ [ 'fw', 'net', 'ACCEPT' ],
+ [ 'net', 'all', 'DROP', 'info' ],
+ [ 'all', 'all', 'REJECT', 'info' ],
+ );
+ set_config_file('rules',
+ (map
+ { map_each { [ 'ACCEPT', $_, 'fw', $::a, join(',', @$::b), '-' ] } %ports_by_proto }
+ ('net', if_($conf->{masquerade}, 'masq'), if_($conf->{loc_interface}, 'loc'))),
+ if_($conf->{masquerade}, map { [ 'ACCEPT', 'masq', 'fw', 'tcp', join(',', @drakgw_ports), '-' ] } 'tcp', 'udp'),
+ );
+ set_config_file('masq',
+ $conf->{masquerade} ? [ $conf->{net_interface}, $conf->{masquerade}{subnet} ]: (),
+ );
+
+ if ($conf->{disabled}) {
+ run_program::rooted($::prefix, 'chkconfig', '--del', 'shorewall');
+ run_program::run('service', 'shorewall', 'stop') if $::isStandalone;
+ run_program::run('service', 'shorewall', 'clear') if $::isStandalone;
+ } else {
+ run_program::rooted($::prefix, 'chkconfig', '--add', 'shorewall');
+ run_program::run('service', 'shorewall', 'restart') if $::isStandalone;
+ }
+}
+
+1;
+